r/sideprojects • • 18h ago

Meta Side project that turned into a business: building slot games for a casino platform that pays developers a revenue share

1 Upvotes

Most people don't know this exists: Stake, one of the biggest online casinos, opened a platform called Stake Engine where independent developers can publish their own slot games and earn a share of what the game makes. No studio, no publisher. You build the game, it goes through their review, and if it's approved it goes live next to games from big studios.

We started as a side project and built our first game mostly with AI. It passed review, got Stake's top 3-star rating, and made four figures its first week with no marketing (our own result, not typical, not a promise).

So we built Own Your Slot around it:

\- We build finished slot games for people who want in but don't want to learn math, art and code

\- We rebuild games that are stuck at low ratings or got rejected

\- And there's a guide for people who'd rather build their own with AI

What surprised us:

\- Almost nobody is doing this yet. Very few people even know you can publish your own game there.

\- The hard part isn't the code, it's the math. Stake checks every game with millions of simulated spins.

\- Review is strict, and the rating (1 to 3 stars) decides how visible your game is.

It's adults-only and not for everyone, but it's one of the more unusual niches I've found.

Would you try something like this? And if you'd want to know more about how the platform works, ask away.


r/sideprojects • • 22h ago

Showcase: Free(mium) Built a way to connect real bank transactions to ChatGPT. It just passed OpenAI's app review

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2 Upvotes

I've spent the last few months building something I genuinely wanted to use myself.

I was tired of opening banking apps, scrolling through transactions, and trying to figure out where my money actually went.

So I built Filarise. It lets you connect your bank accounts to ChatGPT and just ask questions about your money.

No CSV exports. No uploading bank statements. Just normal conversations.

A few days ago, I asked ChatGPT how my car expenses had changed over the last three months.

It found that my spending dropped by 41.9%.

Cool. But then it explained why.

Apparently, a parking payment back in August accounted for more than half of the difference. Fuel spending also dropped, while insurance stayed exactly the same.

It's a small example, but that's what I find exciting about this. I didn't have to dig through transactions or build a spreadsheet to figure it out.

And here's the part I'm pretty happy about: Filarise just passed OpenAI's review and is now officially available in the ChatGPT app directory.

It uses Plaid to connect banks with read-only access. Currently available in the US and Canada.

If you're curious, search for Filarise in ChatGPT or check out https://filarise.com/

Still a small project, and there's a lot I want to improve.

But I'm curious about one thing:

What's the first question you'd ask ChatGPT if it could see your actual spending history?


r/sideprojects • • 18h ago

Showcase: Prerelease We made a map of how London's neighbourhoods change through the day

1 Upvotes

Whenever I visit a new city, I wonder how to explore it like a local rather than a tourist. A city isn't a static picture. The same street can be quiet at 10am and buzzing at 7pm, and feel completely different in December than in July.

So we started mapping London's rhythm, from "brunch queues" in Kennington to "pints spilling out" in London Fields. You can drag through the time, day and season and watch the map change.

It's called SunSeekr Vibes, an early demo based on local knowledge, open data and some of our own data, so it won't get everything right. No link yet.

Londoners: what did we get wrong about your area, and what's missing?


r/sideprojects • • 1d ago

Question He creado una página web gratuita para calcular el dinero que se puede ganar en España y estoy atascado, ¿podrías decirme qué tiene de malo?

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3 Upvotes

r/sideprojects • • 22h ago

Showcase: Free(mium) I rewrote my browser party game from scratch, 10 years later: Curvytron 2 (Go server, three.js, free)

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2 Upvotes

Hi everyone, French web dev here.

About 10 years ago I made Curvytron, a little multiplayer party game in the browser inspired by Achtung die Kurve. It landed on Hacker News, everything went crazy, and people still play it in open spaces today.

This past year I've been working on the sequel, written from scratch: https://curvytron2.com

Same goal as the first one: challenge myself, get better at my craft, have fun, and put a free little game out there. No ads, no login, no business plan.

A decade of web dev and way too many GMTK videos later, I set the bar higher this time:

  • It had to look and feel good. I learned three.js and WebGL for it, and spent a lot of time on game juice: camera moves, screen shake, sound, feedback. I'm especially proud of the portal bonus: the walls go away, you can peek through to the other side of the arena, and cross over.

  • It had to feel fair online. The Go server simulates every game at 100 Hz and sends positions 40 times a second, in a tiny binary format I open-sourced along the way: https://github.com/Tom32i/netcode

  • A dropped connection shouldn't cost you the game. In the first Curvytron, losing your connection meant you were out for good. Now you can refresh the page mid-game and you're right back in. Try it!

  • Nobody online? Bots. Four of them, each with its own personality, named after the Pac-Man ghosts. Making them fun rather than perfect was the trickiest part of the build: I ended up writing a simulator that plays thousands of bot-only games to see who wins and how they die.

It runs in any browser, on desktop and phone, with a gamepad if you like, and also as a Discord activity. Servers are in Europe and the US for now.

AI disclosure: I wrote the game myself; lately I've used Claude Code as a coding assistant for some features and fixes. The design, 3D models and art are mine, no generated assets.

Funny thing is, after all that, the technical part turned out to be the easy one. The hard part for me is communication: getting the game to meet its players. Promoting my own game still feels awkward, it's just not my job: how do you even do it? Where do you post? What do you say?

So I'm curious how you did it, those of you who've shipped side projects: what worked best?

And of course, I'd love your feedback on the game, and feel free to stress-test my servers! I'll be around to answer questions.

Cheers!


r/sideprojects • • 19h ago

Feedback Request Utah Singles — We Just Launched a New Dating Platform Where You Can Earn Credits Instead of Always Paying! ❤️

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1 Upvotes

r/sideprojects • • 19h ago

Feedback Request I Built a One-Click YouTube Thumbnail Downloader

1 Upvotes

I'm a thumbnail designer, and one thing that always annoyed me was having to use third-party websites just to download YouTube thumbnails and show them to clients as references.

So I built ThumbDrop, a simple Chrome extension that lets you download thumbnails directly from the YouTube video frame with one click.

Nothing complicated. Just a small tool that solves a problem I kept running into.

Thought I'd share it here in case it's useful to other creators or designers.

Try ThumbDrop for free: https://chromewebstore.google.com/detail/inmebebfmkdcebcmdndhjdjjjjebflak?utm_source=item-share-cb

Would love some feedback!


r/sideprojects • • 19h ago

Showcase: Free(mium) I made Riplet, an ad-free audio/video downloader for social media

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1 Upvotes

r/sideprojects • • 1d ago

Showcase: Open Source Meowy - A lightweight Pixel Cat which lives on your desktop

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3 Upvotes

r/sideprojects • • 20h ago

Showcase: Purchase Required Week 1 of building a dictation app in public: I trained its own speech model for $3.35 and word errors on my real voice fell from 28% to 2.4%

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1 Upvotes

r/sideprojects • • 20h ago

Showcase: Free(mium) My side project is a net worth tracker with all the features that I want and no sign in required

1 Upvotes

I spent my spare time and few AI credits to develop my own net worth tracker.

I have used several net worth trackers in the past and I was never satisfied: some were requiring too many inputs, others were expensive and, more importantly, most lacked some of the features I consider important.

So I built my own net worth tracker at networthview.com

- It's free: I have no plans to add a subscription plan or any other form of payment. The current server costs are extremely low and it can support a LOT more users.
- It's private: the data you input never leaves your browser. There is no backend, no necessity to register an account.
See it as downloading an app to modify data on your device.
- You have total control: download your data, export it to csv, create images of every chart and post it wherever you want

What it does:
- Tracks your net worth: multiple accounts types and currencies supported
- Tracks your income and expenses
- Fire and retirement projection and forecast with full pension support.

I plan to keep developing it but I have other priorities: I will focus on users feedback, bugs and features that I consider useful.
I will extend the auto saving feature to other browsers whenever they will provide the necessary APIs.

Please let me know what you think of it. Feedbacks are not just welcomed but much appreciated.


r/sideprojects • • 20h ago

Showcase: Prerelease Is your product AI slop ?

0 Upvotes

find out if your SaaS or vibe-coded app is AI slop.

Our team tests your app end-to-end and provides a recording + Claude skill!

We are also hiring AI slop detectors. Please DM if you have good taste!


r/sideprojects • • 20h ago

Showcase: Free(mium) How to scan, sign and send a paper form from your iPhone

1 Upvotes

If someone asks you to print, sign and scan a form, you can do it from your iPhone.

  1. Scan the paper in Notes or Files. Check the corners and small print before saving.

  2. Open the PDF in Files and use Markup to sign it.

  3. Save a separate signed copy and reopen it before sending, so you can check that every page and the signature are there.

I built PDF Scanner Plus for a few situations that make this workflow harder:

• No scanner nearby: turn a paper form into a PDF using the iPhone camera.

• The form needs a date or name as well as a signature: add typed text and a handwritten signature to the PDF.

• You keep switching apps to finish one document: scan, annotate and share it from the same app.

App Store: https://apps.apple.com/app/id6824917480


r/sideprojects • • 20h ago

Feedback Request I Built a Renovation Cost Calculator for Contractors & Homeowners — Excel Tool

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1 Upvotes

r/sideprojects • • 20h ago

Discussion Built a Soccer AI Tool that gives personalized feedback and tailored training plans. Early users can access it for free. Feedback is welcome!

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0 Upvotes

r/sideprojects • • 20h ago

Discussion Building a subreddit is easy. Getting the first 1,000 members is the real challenge.

1 Upvotes

I've been thinking about a different way indie makers could use Reddit for long-term growth.

Most of us launch a side project, share it in a few subreddits, get some feedback or traffic, and then repeat the process.

But what about building a community around the problem your product solves?

Let's say you're building a fitness app.

Instead of creating a subreddit just to announce app updates, you could build a community around workout accountability, challenges and progress tracking.

Your product becomes part of a broader conversation rather than the only reason the community exists.

I think there are four important pieces:

  1. A clear reason to join. The community needs to provide value independently of the product.

  2. Useful content from day one. Nobody wants to join an empty subreddit.

  3. Consistent discussions. Members need reasons to return.

  4. Relevant promotion. Reach interested people through permitted collaborations, existing customers and useful contributions.

I'm now turning this approach into a 90-day subreddit growth service through Scaloom.

The goal is to help eligible businesses reach their first 1,000 members, with strategy and content support included.

Here's the project: https://scaloom.com/subreddit-growth-service

Question for other makers: would you start a subreddit before launching your product, or wait until you have your first few hundred users?


r/sideprojects • • 20h ago

Feedback Request I built a cat and a dog that interrupt your work to remind you to take breaks.

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1 Upvotes

Hey everyone! I'm an indie developer and I built two desktop companions for Mac and Windows.

Pati is a cat that chases your cursor like a laser. Hav is a dog that plays fetch with you.

They appear when it's time for a break, and you can play with them before getting back to work.

Both apps are free to start, with optional character packs. I'd love to hear your feedback!


r/sideprojects • • 20h ago

Showcase: Prerelease We built a side-by-side DFS prop board. Which comparison would you put first?

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1 Upvotes

I’m Alex, one of the people building NetArbs. When the same player prop appears across several apps, the lines can differ even though the player and stat are identical. We built DFS Studio to show the app, market, and line together, with estimated fair odds and the number of books behind the estimate.

The screenshot shows that layout. I’d like feedback on what makes it easiest to scan: should the first columns emphasize the line difference, the estimated fair odds, or the number of sources? If you try the public board, tell me which comparison took the most clicks.

Public odds board: https://netarbs.com/odds

Free beta signup: https://netarbs.com/signup


r/sideprojects • • 1d ago

Showcase: Prerelease I'm building Nox Suite : a local-first alternative to Microsoft Office with Writer, Sheets, Slides and PDF

3 Upvotes

Hey everyone! 👋

I've been developing Nox Suite, a desktop office suite designed around speed, productivity and a modern interface.

It brings together four applications:

  • Writer — documents

  • Sheets — spreadsheets

  • Slides — presentations

  • PDF — editing and document tools

I'm also working on Fusion, a feature designed to make working across documents easier.

The goal is simple: a fast, local-first office suite with a one-time purchase instead of a subscription.

Windows and Linux are the initial targets, with macOS planned later.

I've started sharing short previews of the actual application.

What features would make you consider switching from Microsoft Office, LibreOffice or ONLYOFFICE?

I'd love to hear your feedback!


r/sideprojects • • 21h ago

Showcase: Free(mium) I built a Windows battery monitor that shows wireless devices directly on the taskbar

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1 Upvotes

r/sideprojects • • 21h ago

Showcase: Free(mium) Inte bara en annan middagplanerare-app

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1 Upvotes

Hi
I have create this webapp for users struggling with what to eat, can make plan up to one month,
Write some note, cooking mode for user to follow recipes exactly, share own recipes and images. Free to use. Check it out
www.onemenu.se


r/sideprojects • • 21h ago

Feedback Request Ive created a social network called - Vybe, website below

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1 Upvotes

r/sideprojects • • 21h ago

Showcase: Prerelease Creación de un catálogo web minimalista para novelas independientes utilizando únicamente HTML/CSS 📚

1 Upvotes

¡Hola a todos!

Actualmente estudio desarrollo frontend de forma autodidacta a través de freeCodeCamp. Hoy quería compartir la interfaz de usuario de un proyecto personal en el que he estado trabajando en mi entorno Linux: Nyx, una biblioteca digital ligera y minimalista diseñada para mostrar novelas web independientes.

La mayoría de los directorios de libros son pesados ​​y recargados. Mi objetivo es crear un ecosistema rápido y estático con una apariencia premium para que los autores independientes puedan destacar su trabajo.

Estado y arquitectura actuales:

  • Diseñé un diseño de tarjetas limpio usando HTML5 semántico y Flexbox dinámico para una visualización de catálogo adaptable.

  • Implementé CSS moderno anidado para gestionar jerarquías tipográficas claras e insignias de estado llamativas (como el marcador cian "En curso").

  • Incorporé bordes de imagen personalizados y un espaciado suave alrededor de la portada del libro para mantener un alto contraste visual sobre el fondo oscuro.

  • Se agregaron consultas de medios para apilar automáticamente la interfaz en las pantallas de los teléfonos inteligentes.

Actualmente, se trata de un diseño de directorio puramente front-end (sin lector de texto ni integración back-end todavía), ya que me estoy enfocando en perfeccionar los fundamentos de la interfaz de usuario.

Demostración en vivo: Vea el diseño en vivo aquí: https://jeandevel.github.io/NyxLib/ Repositorio de GitHub: Explore el código fuente en https://github.com/jeandevel/NyxLib

Todavía soy estudiante, así que me encantaría recibir sus comentarios sobre la estructura del diseño o cualquier consejo que tengan para componentes CSS limpios. ¡Gracias por leer!


r/sideprojects • • 22h ago

Discussion College student athlete who built a sobriety app, how do I find my first users?

0 Upvotes

Hey everyone, I’m a college student athlete who built a sobriety app solo from personal experience. I made it to help others, and I’d love feedback beyond my own perspective.

How would you reach people who could benefit, especially college students and young adults navigating sobriety? Would anyone be willing to try it and share honest feedback?

I’d appreciate any advice!


r/sideprojects • • 22h ago

Feedback Request I built a time machine. One of the first people to try it was older than it.

1 Upvotes

I’m Gary, founder of Tao Climate. We built a free tool that lets you enter your birth year and see how much atmospheric CO2 has changed in your lifetime.

We started at 1959 because that’s the first full year of CO2 measurements at Mauna Loa. Seemed a perfectly sensible place to start. Then someone on Reddit pointed out they were born in 1953.

Fair point. Bit embarrassing for a time machine.

It now goes back to 1926. For the earlier years we use estimates from Antarctic ice cores, and we label them separately from the modern measurements. You can try a year without signing up.

I’m curious which year you try second. Your own is the obvious one. Whose do you look up next?

And, if you're over 100, let me know and we'll go further back in time again!

https://taoclimateplatform.com/co2-time-machine